Added start-up log message when NSZombieEnabled or NSAutoreleaseFreedObjectCheckEnabled are active.

As suggested by CocoaDev, here: http://cocoadev.com/wiki/NSZombieEnabled
Added overlay FPS and project name.

• Added rolling-average FPS calculation to SceneViewController. It's pretty sloppy and only averages the last 5 together right now, but it's accurate (no 0s averaged in), and shouldn't break or display weird stuff.
• Added drawing project name and FPS lines to SceneView. Calculates line heights, so adding additional lines in the future should be easy. Also a bit sloppy; this is a quick implementation, not a DRY one.
• Had to create an unholy accessor from the view back to the controller for this to work without much architectural planning. So now SceneView has an owner property that's set by SceneViewContoller. Uckk.

Fixed:
• drawRect: was accidentally calling drawCircleWithin: directly, instead of drawOverlayLayerWithin: (which calls drawCircleWithin:). Fixed now.